48 THE Mrcroscops. 
EXCHANGES. 
(EHachanges are inserted without charge. Subscribers having microscope apparatus for sale or 
exchange can announce the same without charge.) 
SSS EE ee 
FOR EXCHANGE—Mound builders relics, pottery aepmentis and Indian relics for medical books 
and surgical instruments. DR. HE NRY W. COE, Mandan, Dakota. 
I HAVE Zentmayer’s improved centennial microscope binocular, including all improvements to 
date. Sameasnew. Cost $550. will sell for $400. A. G. FIELD, Des Moines, Iowa. 
ANTED—One copy of Vol. I., No 1 of Phin’s Journal of Microsco y. Will give a well 
mounted and interesting microscopic object. M. S. WIARD, New Britain, Conn. 
ONE-TENTH immersion. adjustable obj. by Gundlach, for sale. 
HAROLD PLOWE, 136 High st., Peoria, Ill. 
POR EXCHANGE —A Hartnack 1-11 objective, 170°. Will exchange for a good low power glass. 
A. Y. MOORE, 67 Euclid Ave., Cleveland, Ohio. 
FoR EXCHANGE—One Fiddian Microscopic Illuminator, one Brass injecting Syringe with four 
pipes and stop cock, one Microtome (Brass) Rivet, improved, with knife, one Dr. Seilers Section 
Knife and Carrier, one warm Stage with Thermometer and Gas Chamber in exchange for first 
class Polariscope with goniometer E epiece or collection of thin mounted Rock sections. 
DR. HENRY FROEHLING, 17 South 12th Street, Richmond, Va. 
POR EXCHANGE—Zeitschrift fur wissenschaftliche Mikroskopie, Volume I., 1884. Would 
prefer type-slides of diatomsin exchange. Address, 
A.B. AUBERT, Orono, Penobscot County, Maine 
FRESH WATER ALGA&, very numerous species, incInding Volyox in abundance, Desmids of 
all kinds, Draparnaldia, Rivalaria, Anabaena Tetraspora &c., &c. 
J. M, ADAMS, Watertown, N. Y. 
GEEDS of Orthocarpus Purpurascens and slides of same in exchange for other objects mounted 
or unmounted. EDWARD GRAY, M. D., Benicia, Ualifornia. 
W ANTED—Well cleaned and selected Foramenifera for which cash will be paid or slides given. 
EDWARD G. DAY, Riverside, Conn. 
]DIATOMACEOUS Earth from Denyer, Colo., in exchange for mounting material. 
H. B. CHAMBERLIN, box 1597, Denver, Colo. 
WANTED. —Diatoms on Algz or in muds from all the tropical sea shores, especially from 
Puget Sound, Pensacola, Campeach Bay, Tampa Bay, and fossil earths trom Petersburg, 
Popleine, Virg. Rappahanock Cliff, Piscataway. New and old Nottingham, Maryland. Will give 
cash or beautiful diatom material from Europe in exchange. 4 
! J.C. RINNBOCK, Wien, Simmering 14, Austria. 
Hi XCHANGE. —Parties having diatomaceous earths or other microscopical material, prepared or 
crude, for exchange, please communicate with M. A. BOOTH, Longmeadow. Msss. 
iM HAVE for exchange Stellate Hairs of Plants, Pollen, and Seeds; also various Diatoms, Polycis- 
tina, ete., and a variety of other good objects, all well mounted. W. FARNELL, Macon, Ga. 
HISTOLOGICAL and Pathological Slides to exchange for otter eee slides. 
F. F. COLWELL, Urbana, Ohio. 
OR SALE.—A copy of Prof. Leidy’s great work on the Rhizopods has been left at this office for 
sale. Price, $7.50. C. H. STOWELL. 
—— 
I WILL exchange good histological for other first-class mounts. 
S. G. SHANKS, M.D., 547 Clinton Avenue, Albany, N.Y. 
LEASE announce that I will supply labels, cards, and other first-class printing in exchange for 
good slides. EUGENE PINCKNEY, Dixon, Ill. 
ACARI INSECTS, pathological and other well mounted slides, in exchange for Pleurosigma, 
Trichina, Diatoms, Stained Bacteria, ete. J.O. STILLSON, Indianapolis, Indiana. 
—_______, 
MPHIPLEURA PELLUCIDA, or any other test diatom, mounted in the new medium, having 
refractive index of 2.4, can be procured from H. H. CHASE, M.D., Geneva, N.Y. 
I WILL SEND a quantity of good diatomaceous material containing Bacillaria Paradoxa—all liy- 
ing—in exchange for well mounted slides. JAS. C. LATHROP, Bridgeport, Conn. 
DPIATOMACEOUS Clay from this place and slides of Foraminifera and Diatoms to exchange for 
fine slides or material. E. H. RICHARDS, Woburn, Mass. 
ATHOLOGICAL, Histological and Miscellaneous Mounts, will be exchanged for mounted speci- 
mens or material. H. W, WESTOVER, M. D., St. Joseph, Mo. 
